Clamp.



'JT C. HUFFMEISTBR.

CLAMP. APPLIU IIIIIII LED APB. 111111 8.

Patented Dec. 22,'1908.

mmm

UNITED STATES PATENT OFFICE.

JOHN C. HOFFMEISTER, OF PALATINE, ILLINOIS.

CLAMP.

To all whom it 'may concern:

Be it known that I, JOHN C. IFIoFrMEIsTER, citizen of the United States, residing at Palatine, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Clamps; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to maken and use the same.

This invention relates to a novel construction in a clamp particularly' adapted for use in connection with quilting or curtain stretching frames to secure the frame pieces to each other, and to receive one end of a supporting leg to support such frame at an elevation, the object being to provide a sim ple, efficient clamp adapted to the purpose described and it consists in the features of construction and combinations of parts hereinafter fully described and claimed.

In the accompanying drawings illustrating this invention: Figure 1 is a side elevation of a clamp constructed in accordance with my invention. Fig. 2 is a rear elevation of the same. Fig. 3 is an elevation of the side opposite that shown in Fig. l. Fig. t is a detail plan section on the line 4 4; of Fig. 3.

My invention relates particularly to the specific construction of the clamp whereby the same is rendered very cheap to manufacture and convenient to use.

My said clamp comprises a hollow skeleton body portion A provided at its upper and lower ends with parallel arms B and C, the former of which is equipped with the thumb-screw D between which and the arm C the work is engaged in the usual manner. The said hollow body portion A is tapered, being of greater area at its lower end, the upper end thereof being capped by the inner end portion E of the arm B. The said body portion is, as stated, of skeleton form being cast without the employment of a core, the diametrically opposite sides of said body portion consisting respectively of one 'and two substantially semicylindrical relatively staggered portions Gr and F connected together by means of narrow bands H integral Specification of Letters Patent.

Application filed April 16, 1908.

Patented Dec. 22, 1908.

Serial No. 427,481.

therewith. The said portions F and Gr are formed in the top and bottom of the mold, the latter carrying projecting portions which intert to form the equivalent of a core, and the arms B and C are equipped with tapered reinforcing ribs I and J, said arms being so disposed relatively to the porvtions F and Gr as to enable the entire casting to be easily withdrawn from the mold. It will be noted that said arms B and G are disposed at right angles to a peripheral portion of the body A, and the latter being tapered, the axis thereof becomes inclined when the said arms B and C are horizontally disposed. The said body is adapted to receive the end portion of a stick (not shown) which constitutes a supporting leg for a frame or the like, the parts of which are secured to each other by said clamps, said supporting legs being rendered divergent by the aforesaid inclination of the axis of the body portion A and thus more firmly supporting the frame against lateral strains.

My said clamp is particularly convenient for use in connection with quilting and curtain stretching frames, affording both clamping and supporting means which latter are not in the way of and a constant source of inconvenience and annoyance to the operator.

I claim as my invention:

A clamp comprising a hollow tapered skeleton body portion covered at its smaller end and adapted to receive one end of a supporting stick, said body portion comprising a plurality of respectively oppositely disposed relatively staggered substantially semicylindrical members engaging said supporting stick, and being provided at one side wit-h parallel arms extending at a right an gle to the portion of the periphery from which they extend, the axis of said body being inclined when saidarms are horizontally disposed, one of the latter being equipped with a thumb-screw.

In testimony whereof I have signed my name in the presence of two subscribing witnesses.

JOHN C. HOFFMEISTER. Witnesses:

RUDOLPH WM. Lo'rz, E. L. MOORE. 

